Color:Red+WhiteMaterial:EPS+PCSize:Head Circumference Approx 57-62cmBuilt-in high-grade sweat-absorbing liner.And have adjuster knob, adjustable head size.Soft Rubber Regulator: retractable, one hand adjustment, adjust the range to meet the different head circumference size.Aerodynamic and ventilation design - multiple big ventilation holes allow air to go through the cycle helmet, helping to keep head coolNote: Since the size above is measured by hand,the size of the actual item you received could be slightly different from the size above. Meanwhile,please be reminded that due to lighting effects,monitor #39;s brightness / contrast settings etc,there could be some slight differences in the color tone of the pictures and the actual item. Your kind understanding will be much appreciated.Packages Include:1PC x Cycling HelmetUltra-light Materials, super light weight equivalent to regular leisure cap